Debian: DSA-4347-1 Critical: Perl Heap Overflow Issues Found

CVE-2018-18311

Jayakrishna Menon and Christophe Hauser discovered an integer
overflow vulnerability in Perl_my_setenv leading to a heap-based
buffer overflow with attacker-controlled input.

CVE-2018-18312

Eiichi Tsukata discovered that a crafted regular expression could
cause a heap-based buffer overflow write during compilation,
potentially allowing arbitrary code execution.

CVE-2018-18313

Eiichi Tsukata discovered that a crafted regular expression could
cause a heap-based buffer overflow read during compilation which
leads to information leak.

CVE-2018-18314

Jakub Wilk discovered that a specially crafted regular expression
could lead to a heap-based buffer overflow.

For the stable distribution (stretch), these problems have been fixed in
version 5.24.1-3+deb9u5.

We recommend that you upgrade your perl packages.

For the detailed security status of perl please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/source-package/perl

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